experimental_metricsgeneration divide calculation is not correct

[gaussye]

Component(s)

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What happened?

Description

I using experimental_metricsgeneration to get the utilization if volume by using divide function. Configure: experimental_metricsgeneration: rules: - name: pvc.utilization type: calculate metric1: kubelet_volume_stats_used_bytes metric2: kubelet_volume_stats_capacity_bytes operation: divide - name: pvc.utilization.percentage type: calculate metric1: kubelet_volume_stats_used_bytes metric2: kubelet_volume_stats_capacity_bytes operation: percent

Below are the metrics:

kubelet_volume_stats_available_bytes	33057693696
kubelet_volume_stats_capacity_bytes	33501757440
kubelet_volume_stats_inodes	2097152
kubelet_volume_stats_inodes_free	2097075
kubelet_volume_stats_inodes_used	77
kubelet_volume_stats_used_bytes	427286528
namespace	kubecost
net.host.name	ip-10-0-23-147.eu-west-1.compute.internal
persistentvolumeclaim	cost-analyzer-prometheus-server
pvc.utilization	0.10311770985726147
pvc.utilization.percentage	10.311770985726147

Steps to Reproduce

Expected Result

pvc.utilization = kubelet_volume_stats_used_bytes/kubelet_volume_stats_capacity_bytes=427286528/33501757440=0.01275

Actual Result

pvc.utilization = 0.10311770985726147

Collector version

0.38.1

Environment information

Environment

OS: (e.g., "Ubuntu 20.04") Compiler(if manually compiled): (e.g., "go 14.2")

OpenTelemetry Collector configuration

No response

Log output

No response

Additional context

No response